fread无法读取第一列为空的.csv文件 [英] fread unable to read .csv files with first column empty

问题描述

说我有第一个 test.csv ，看起来像这样

Say I have the first test.csv that looks like this

,a,b,c,d,e

如果我尝试使用 read.csv ，它工作正常。

read.csv("test.csv",header=FALSE)
#  V1 V2 V3 V4 V5 V6
#1 NA  a  b  c  d  e
#Warning message:
#In read.table(file = file, header = header, sep = sep, quote = quote,  :
#  incomplete final line found by readTableHeader on 'test.csv'

但是，如果我尝试使用 fread 读取此文件，我会收到一个错误。

However, if I attempt to read this file using fread, i get an error instead.

require(data.table)
fread("test.csv",header=FALSE)
#Error in fread("test.csv", header = FALSE) : 
#  Not positioned correctly after testing format of header row. ch=','

Why does this happen and what can I do to correct this?

推荐答案

为什么会发生这种情况，我该怎么办？运行代码。它似乎工作现在 - 同样为其他人？我认为这可能是一个问题，没有一个新行在结束（因此从 read.csv 的警告，但 fread 处理结束时是否有新行。

I've tried making that csv file and running the code. It seems to work now - same for other people? I thought it might be an issue with not having a new line at the end (hence the warning from read.csv), but fread copes fine whether there's an new line at the end or not.

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